I'm making a technological project. The goal is to write a program that gets an image of the nightsky and predicts the hour in which the photo was taken.
I implemented a well-known method using the big dipper, but it's not enough. I don't want to limit my program to only work when the big dipper is in the image.
When I read about right ascension, my gut told me seeing a star in the sky and knowing its right ascension (RA) would help me deduce how many hours ago the sunset happened, though I couldn't explain how.
I'm not comfortable enough with this coordinate system, so I need help answering this question: Say I konw the location a photo was taken, and I can identify the celestial objects in the sky and get their RA, can I make some calculations to konw/approximate the hour? If so, how?
Thanks in advance!